I am not sure about that, I would guess that CA would have to make RTW take advantage of SLI, not the other way around. Oh well, for now SLI is still highly impractical unless you buy 6600GT's or other budget cards. But if anyone is interested and has the money 2 6600GT's will perform comparably to 1 6800ULTRA, I have heard it is for a lower price, but I don't know by how much.